| 초록 |
Boron-doped diamond (BDD) thin film has a great attention as a novel electrode material due to its extremely wide electrochemical potential window (-1.3 ~ 2.8 V) and corrosion stability. It is not only used as anode in electrochemical oxidation but also cathode in electro- chemical reduction. In this study, BDD was applied as cathode to reduce 4-nitrophenol (4-NP) in aqueous samples and it was compared with anodic oxidation using BDD and DSA® electrode. When 4-NP was destructed by only anodic oxidation, the concentrations of nitrogen intermediates (NO2-, NO3-) increased. Their concentrations were reduced by applying BDD as cathode but the differences were insignificant. When BDD was used as cathode, COD decreased rapidly compared with control tests with DSA®. Nitrate and nitrite concentrations were not changed. It might be the formation of polymer made from polymeric intermediates like aminophenols. In conclusion, 4-NP was removed by cathode reduction as well as anode oxidation using BDD electrode. |
